PH- Metric Study of Mixed Ligand Complexes of Vanadium Metal Ion with 8-Hydroxyquinoline and L-Amino Acids in 50% Methanol-Water System

Abstract

The interaction between vanadium metal ions with 8-hydroxyquinoline (L1) and amino acids such as Cysteine (L2), Methionine (L3) etc. have been studied at 0.2 M ionic strength in 50% Methanol-water medium. Experimental works have been done through simple pH metrically and calculation parts have been done by Bjerrum method. It is observed that metal vanadium ion form a complexes with (L1) 8-hydroxyquinoline and (L2) amino acids in 1:1:1 proportion. The values of metal ligand stability constant (log k) during formation of complex were estimate and compare with literature data. The effects of various amino acids bonded to central metal atom were studied from estimated data.